java Date-Time API conversion

In this article, we will discuss the Java Date-Time data conversion. In the latest Java Date-Time API there are features for converting data from LocalDate to LocalDateTime and vice versa as well as conversion from LocalTime to LocalDateTime and vice versa.

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Convert data from LocalDate to LocalDateTime or from LocalDateTime to LocalDate

Sometimes there is a need to convert from LocalDate to LocalDateTime or vice versa. To convert from LocalDateTime to LocalTime, you can use the toLocalDate() method. while to convert from LocalDate to LocalDateTime, you can use the atTime() method.

LocalDateTime localDateTime = LocalDateTime.now();
System.out.println(localDateTime);
LocalDate localDate = localDateTime.toLocalDate();
System.out.println(localDate);
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LocalDateTime result = localDate.atTime(LocalTime.now());
System.out.println(result);

output:
2021–11–06T21:09:00.653
2021–11–06
2021–11–06T21:14:10.236

Convert data from LocalTime to LocalDateTime or from LocalDateTime to LocalTime

In addition to converting the LocalDate data type, you can also convert from LocalTime to LocalDateTime or vice versa. To convert from LocalDateTime to LocalTime, you can use the toLocalTime() method. while to convert from LocalTime to LocalDateTime can use the atDate() method.

LocalDateTime localDateTime = LocalDateTime.now();
System.out.println(localDateTime);
LocalTime localTime = localDateTime.toLocalTime();
System.out.println(localTime);
LocalDateTime result = localTime.atDate(LocalDate.now());
System.out.println(result);

output:
2021–11–06T21:20:51.379
21:20:51.379
2021–11–06T21:20:51.379